耐用的功能-活动似乎停止了

Question

Please could someone confirm my thoughts.

I have an orchestration, which is calling the same Activity say 400 times. I'm using a fan-out/fan-in concept.

await Task.WhenAll(collectionOfTasks);

If those 400 activities take longer than 10 minutes in total to process, it seems that it doesn't complete, and doesn't pick up/continue again, unless another call is made to the orchestration method.

Is this right? Does the Azure Function shut down if nothing is running in the Orchestration for 10 minutes? Doesn't matter if the Activities functions are still running?

Answer 1

Note that each individual function execution on a consumption Functions application can only run for 10 minutes before the application is recycled by the Azure infrastructure. This is a little nuanced for orchestrations, as they can effectively run forever, as every time they await an activity function, the execution stops, and once the activity finishes, the execution will resume. As long as you design your orchestration function so that it never runs for more than 10 minutes at a time, it can effectively run forever.

What you may be running into is one (or more) of your 400 activity function executions taking longer than 10 minutes. If that is the case, it could be recycling the application, and not restarting until make another call to the orchestration method.